'Only black' future does mean a bleak future! Because the whites in RSA aren't going to vanish even if someone wishes them to.
A few days ago, someone in QL recommended me a movie called 'amandla-A revolution in 4 part harmony'.
I liked the movie very much. It showed how the blacks collectively fought against the apartheid, and how they sacrificed everything to join the anti-apartheid movement. It seemed that they took pride in their peaceful struggle!
But if they again bring the discrimination back, albeit in the reverse fashion what good does it do? All the sacrifice and struggle of their leaders will go invain!

So any future without blacks or whites will be bleak!